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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_cache_CacheChild_h
#define mozilla_dom_cache_CacheChild_h
#include "mozilla/dom/cache/ActorChild.h"
#include "mozilla/dom/cache/PCacheChild.h"
class nsIAsyncInputStream;
class nsIGlobalObject;
namespace mozilla {
namespace dom {
class Promise;
namespace cache {
class Cache;
class CacheOpArgs;
class CacheChild final : public PCacheChild
, public ActorChild
{
public:
class MOZ_RAII AutoLock final
{
CacheChild* mActor;
public:
explicit AutoLock(CacheChild* aActor)
: mActor(aActor)
{
MOZ_DIAGNOSTIC_ASSERT(mActor);
mActor->Lock();
}
~AutoLock()
{
mActor->Unlock();
}
};
CacheChild();
~CacheChild();
void SetListener(Cache* aListener);
// Must be called by the associated Cache listener in its DestroyInternal()
// method. Also, Cache must call StartDestroyFromListener() on the actor in
// its destructor to trigger ActorDestroy() if it has not been called yet.
void ClearListener();
void
ExecuteOp(nsIGlobalObject* aGlobal, Promise* aPromise,
nsISupports* aParent, const CacheOpArgs& aArgs);
// Our parent Listener object has gone out of scope and is being destroyed.
void StartDestroyFromListener();
private:
// ActorChild methods
// WorkerHolder is trying to destroy due to worker shutdown.
virtual void StartDestroy() override;
// PCacheChild methods
virtual void
ActorDestroy(ActorDestroyReason aReason) override;
virtual PCacheOpChild*
AllocPCacheOpChild(const CacheOpArgs& aOpArgs) override;
virtual bool
DeallocPCacheOpChild(PCacheOpChild* aActor) override;
// utility methods
void
NoteDeletedActor();
void
MaybeFlushDelayedDestroy();
// Methods used to temporarily force the actor alive. Only called from
// AutoLock.
void
Lock();
void
Unlock();
// Use a weak ref so actor does not hold DOM object alive past content use.
// The Cache object must call ClearListener() to null this before its
// destroyed.
Cache* MOZ_NON_OWNING_REF mListener;
uint32_t mNumChildActors;
bool mDelayedDestroy;
bool mLocked;
NS_DECL_OWNINGTHREAD
};
} // namespace cache
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_cache_CacheChild_h
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